Here you can find the source of setDialogWindowToCenter(JDialog dialog)
public static void setDialogWindowToCenter(JDialog dialog)
//package com.java2s; /*// w w w . j a v a 2s. co m * Copyright (C) 2013 Steelkiwi Development, Julia Zudikova * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.awt.Dimension; import java.awt.Toolkit; import javax.swing.JDialog; public class Main { public static void setDialogWindowToCenter(JDialog dialog) { Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); dialog.setBounds((screenSize.width - dialog.getWidth()) / 2, (screenSize.height - dialog.getHeight()) / 2, dialog.getWidth(), dialog.getHeight()); } }